Coats was angry because Dish Network fired him in 2010 after his random drug test came back positive for traces of pot.
Links
[1] http://www.marketplace.org/topics/business/legalized-pot-use-vs-employer-drug-testing
[2] http://rethinkpot.org/tags/business
[3] http://rethinkpot.org/tags/attorney
[4] http://rethinkpot.org/tags/legalization